The latest Opera Mini Beta is out. Beta 4.1 brings a speed increase of up to 50% and the ability to save pages and content. Opera Mini is the single most efficent browser for java phones and times when you need to save data costs. From the press release:

With Opera Mini 4.1 you can:

Go racing

Opera knows a thing or two about performance. Opera Mini 4.1 features speed improvements and is up to 50% faster than Opera Mini 4.

Save pages
Getting ready to lose your signal? Make the most of offline time by saving Web pages for later viewing.

Find content in the page
Finding that word or phrase on the small screen has never been easier. Opera Mini now lets you immediately find the content you want.

Download and upload files
Now you never have to leave Opera Mini for your phone’s clunky native browser to download images, ringtones and other content, or add attachments to e-mail. Opera Mini handles all of these files.